Gcse Statistics: Coursework

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Introduction

GCSE STATISTICS: COURSEWORK

'WHAT AFFECTS A PERSON'S ABILITY TO ESTIMATE?'

Aims, Design and Strategy

This investigation is all about finding out what affect's a person's ability to estimate. To answer the question to its full extent, I need to investigate thoroughly and be precise. My aims for this investigation are:

- To record what factors affect a person's ability to estimate and to what extent.

- To investigate the chosen variables in depth, to ensure an accurate result is made.

The strategy for completing this task will be to simplify down the investigation into different areas. From doing this I can investigate in more depth. I hope to achieve a conclusive set of results to show which variables affect a person's ability to estimate.

Random Selection I am going to use the random button on my calculator to help me choose using the following formulas: Year 7: Ran# � 173 = 129.577 (choose pupil 129) I used the number 173, as there are 173 pupils so each pupil has an equal opportunity of being selected.

Here we see a very negative correlation with only about one or two anomalies, around four points lie on the line of best fit. It is steep indicating that instructor C is a good teacher. Here we see a strong negative correlation, which is very steep, I think Instructor C is good at teaching males.

Upper quartile is 27,500. So the interquartile range would be 27,500 - 23,900 = 3,600. The interquartile range shows the lower and higher quartiles are within 3,600 of each other. This spread shows a greater spread of data, meaning the data is more varied and less consistent, it is also a shows the attendance

A positive correlation is an increase in one variable is accompanied by an increase in the other. This is what I expect my graph to show. Negative correlation is when an increase in one variable is accompanied by a decrease in the other.

I did not use this because this is not entirely random because the players are listed in order by the clubs they play for, so this would mean that there would be a player from every club, and this is not random enough..